Online shopping just got a whole lot easier — or more dangerous, depending on your shopping self-control (personally, I identify a little too well with a certain fictional character).

The SmartSwipe USB Card Reader ($87) plugs into your computer's USB port, and from there, when you want to check out at an online store, you swipe your card, just like you'd do at a department store counter.

SmartSwipe's main selling point is in its security — but the fact that you don't have to key in your credit card number makes an online impulse purchase way too easy. I want this — but think it's a bad idea for me.

What about you — is the SmartSwipe Card Reader a good idea or a bad idea for you?